William p



(N0 Model.)

W. P. HAMMOND.

ORE CRUSH-ER.

No. 267,687. Patented Nov. 21, 1882.

(Eh I IL I i I 5 h WITNEEEE 5 INVENTUR.

Wit-W, Oma /H UNITE STATES PATENT OFFICE.

WILLIAM P. HAMMOND, OFNAPA, CALIFORNIA.

ORE-CRUSHER.

SPECIFICATION forming part of Letters Patent No. 267,687, dated November 21, 1882.

Application filed July 25,1882. (No model.)-

To all whom it may concern Beitknown that I, WILLIAM POTTER HAM- MOND, a citizen of the United States, residing cam.

at Napa, in the county of Napa and State of California, have invented a certain new and useful Improvement in Ore-Crushers, of which the following is a specification.

My present invention relates to an improve ment in that class of ore-crushers for which Letters Patent of the United States. were granted to me Dccember2-l,1872, No. 134,201; and the object of my invention is to impart to the stamper a greater whirling or rotating effect after the end of the cam has left the tappet, and thereby grind or crush the ore between the face of the stamp and the battery-plate before the impetus given to the stamp is lost. I accomplishthis object by the means illustrated in the accompanying drawings, in which- Figure 1 is a front elevation of myimproved device. Fig. 2 is a vertical section of the same, taken in the planes indicated by line as w of Fig. 1. Fig. 3 is a perspective view of the Fig. 4 is an under view of beveled tappet and cam.

The same letters refer to 'the same parts throughout the several views.

It is a well-known fact among mill men who reduce ores by means of the \velltknown stampmill, in which the stamper shaft is lifted, partly rotated, and dropped by means ofa revolving cam and a tappet onthe stampershaft that the more nearly the stamper is caused to perform a complete rotation after the end of the cam leaves the tappet and the face of the stamp falls upon the ore upon the battery-plate the greater is the crushing and grinding efl'ect produced, and that the ore is thus reduced much morerapidly than where the stamp falls deadthat is, when but little or no rotation is produced. In order to'accomplis'h this result 1 construct the outer edge, A,

of the cam will move along the corresponding beveled edge of the tappet from heel to toe, and impart to the Stamper a rotary motion that will continue after the point or toe of the vortex of the tappet, thereby causing more friction and less throw or circularimpetus after the cam had left the tappet, while in my "present improvement the cam travels around upon the edge of the tappet with the results above stated.

It will be seen that by reason of the beveled edgeof the tappet and the action thereon of the beveled cam, the lifting and turnin g movement of the tappet is continued after the outer edge of the cam has left the tappet and until the cam has entirely let goof it, which is just at the point where the cam imparts to the tap pet its most effective rotary impulse.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

In an ore-crusher or stampmill, the combination, with the stamp-stem, of a tappet, B, secured thereon and provided with a beveled or inclined edge around its lower face, and a beveled cam, U, secured to the earn-shaft D, and adapted to engage with the beveled edge of the tappet, whereby the conjoint action of the cam and tappet will impart a lifting and turning movement to the stamp-stem, which movement is continued after the outer edge of the cam has left the tappet and until they are entirely disengaged, substantially as shown and described.

In testimony that I claim the foregoing I have hereunto set my hand and seal this 19th day of June, 1882.

WILLIAM P. HAMMOND. [L.S.

Witnesses:

O. W. M. SMITH, OHAs. E. KELLY. 

